Coronal activity in F-, G-, and K-type stars. I - Relations between parameters characterizing stellar structure and activity

Details Coronal activity in F-, G-, and K-type stars. I - Relations between parameters characterizing stellar structure and activity Coronal activity in F-, G-, and K-type stars. I - Relations between parameters characterizing stellar structure and activity

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...127..289s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 127, no. 2, Nov. 1983, p. 289-296.

Astronomy and Astrophysics

Astrophysics

59

Dwarf Stars, F Stars, G Stars, Giant Stars, K Stars, Stellar Coronas, Stellar Magnetic Fields, Stellar Structure, Chromosphere, Factor Analysis, K Lines, Late Stars, Magnetoactivity, Stellar Spectra

Scientific paper

A sample of 66 stars, containing dwarfs and giants, is subjected to a multidimensional common-factor analysis. The parameters used are the soft X-ray flux density at the stellar surface Fx, the Ca II H + K line-core flux density FH+K, and parameters determining the stellar interior.
We find a high correlation between Fx and the Ca II H+K excess flux ΔFH+K, obtained by subtracting an observational lower limit from FM + K We argue, that the Ca ii lower-limit flux is uncorrelated with hot, X-ray emitting, magnetic structures.
The common-factor analysis shows that, for the stars in the present sample, the relation between Fx and ΔFH+K does not depend on the stellar mass or radius. All stars included in the analysis - single dwarfs and giants, and components of short- period binaries - follow the relation over four decades in Fx: Fx(:)ΔF1.67H+K. The Sun follows this relation during its activity cycle, which suggests that structural changes occur on the Sun (as required by the nonlinearity of the above relation) similar to the structural differences between stars with different average levels of activity.

Affiliated with

Also associated with

No associations

Rating

Coronal activity in F-, G-, and K-type stars. I - Relations between parameters characterizing stellar structure and activity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Coronal activity in F-, G-, and K-type stars. I - Relations between parameters characterizing stellar structure and activity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coronal activity in F-, G-, and K-type stars. I - Relations between parameters characterizing stellar structure and activity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1483678